Loans Receivable Held for Investment, Summary (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		$ 932,960	$ 886,606
Unamortized net deferred loan costs and premiums		1,828	1,971
Gross loans receivable		934,788	888,577
Credit and interest marks on purchased loans, net		(739)	(772)
Allowance for credit losses		(7,552)	(7,348)	$ (6,285)	$ (4,388)
Loans receivable, net		926,497	880,457
Real Estate [Member] | Single-Family [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		28,184	24,702
Gross loans receivable		28,184	24,702
Allowance for credit losses		(298)	(260)	(261)	(109)
Real Estate [Member] | Multi-Family [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		601,126	561,447
Gross loans receivable		602,954	563,418
Allowance for credit losses		(4,325)	(4,413)	(3,932)	(3,273)
Real Estate [Member] | Commercial Real Estate [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		124,717	119,436
Gross loans receivable		124,717	119,436
Allowance for credit losses		(1,109)	(1,094)	(1,012)	(449)
Real Estate [Member] | Church [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		12,573	12,717
Gross loans receivable		12,573	12,717
Allowance for credit losses		(90)	(72)	(92)	(65)
Real Estate [Member] | Construction [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		90,333	89,887
Gross loans receivable		90,333	89,887
Allowance for credit losses		(956)	(932)	(593)	(313)
Commercial - Other [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		63,538	63,450
Allowance for credit losses		$ (722)	$ (529)	(357)	(175)
Commercial - Other [Member] | PPP Loans [Member]
Loans Receivable Held for Investment [Abstract]
Loans receivable, interest rate		1.00%
Commercial - Other [Member] | PPP Loans [Member] | Minimum [Member]
Loans Receivable Held for Investment [Abstract]
Loans receivable, term		2 years	2 years
Commercial - Other [Member] | PPP Loans [Member] | Maximum [Member]
Loans Receivable Held for Investment [Abstract]
Loans receivable, term		5 years	5 years
SBA Loans [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums	[1]	$ 12,475	$ 14,954
Gross loans receivable		12,475	14,954
Allowance for credit losses		(52)	(48)	(38)	0
SBA Loans [Member] | PPP Loans [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		15	2,500
Consumer [Member]
Loans Receivable Held for Investment [Abstract]
Gross loans receivable before deferred loan costs and premiums		14	13
Gross loans receivable		14	13
Allowance for credit losses		$ 0	$ 0	$ 0	$ (4)

[1] Including Paycheck Protection Program (“PPP”) loans.